ISP
Click on the red underlined text to get to the source
... Guidelines for Internet Service Providers (ISPs) ...
... IP addresses. Addresses are
allocated to ISPs by regional registries to assign to its customer
...
... ISPs who exchange routing information with other ISPs at multiple
locations and operate without default routing may request space
...
... routing may request space
directly from the regional registry in its geographical area. ISPs
with no designated regional registry may contact any regional
...
... addressing, implemented using Classless
Inter-Domain Routing (CIDR), all other ISPs should request address
space directly from its upstream provider ...
... address
space directly from its upstream provider. ISPs only request address
space directly from regional registries if their immediate
...
...
a) the ISP is directly connected to a major routing exchange
(for purposes of this document, a major routing ...
... is defined as a neutral layer 2 exchange point connecting
four or more unrelated ISPs.)
b) the ISP ...
... ISPs.)
b) the ISP is multi-homed, that is, it has more than one
simultaneous connection to the global Internet ...
... 1. CIDR addresses are allocated to ISPs in blocks. It is
recommended that those blocks remain intact. Fragmentation of
...
... Fragmentation of
CIDR blocks is discouraged. More specifically, ISPs are
encouraged to treat address assignments as loans for the
...
... renumber into the new provider's address space. The ISP
should allow sufficient time for the renumbering process to be
completed before the IP addresses ...
... bit boundaries.
3. ISPs are required to utilize address space in an efficient
manner. To this end, ISPs ...
... ISPs are required to utilize address space in an efficient
manner. To this end, ISPs should have documented
justification available for each assignment. The regional
registry ...
... ISPs using a slow-start
procedure. New ISPs will receive a minimal amount based
on immediate requirement. Thereafter, allocated blocks may be
...
... address allocations will provide enough address space
to enable the ISP to assign addresses for three months
without requesting additional address space ...
... prefix longer than /24 if the
organization can provide documentation from a registry recognized ISP
indicating the ISP will accept the long prefix ...
... registry recognized ISP
indicating the ISP will accept the long prefix for injection into the
global routing system ...
... address space, sub-registries
(Local IRs, ISPs, etc.) must adhere to the guidelines of its
regional registry. In turn, it must also ensure that its
...
... ARPA records only on the parent blocks of IP addresses issued
directly to the ISPs or those CIDR blocks of less than /16. Local
IRs/ISPs ...
... ISPs or those CIDR blocks of less than /16. Local
IRs/ISPs with a prefix length of /16 or shorter will be responsible
for maintaining all IN-ADDR.ARPA ...